( BrE , informal ) to tell sb in authority about sth wrong, dishonest etc. that sb else has done :
Don't worry—he won't split on us.
( BrE , informal ) to tell sb in authority about sth wrong, dishonest etc. that sb else has done :
Don't worry—he won't split on us.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005